There are no hydraulic shops near me, a couple of parts stores will make hoses but I've had mixed success with them. When I put the levelers on my motor home I used reusable fittings. They're more expensive but I can make the hose I need in a few minutes and it will work the first time, if it it breaks I can make another just as quickly.
Replacing all the hoses seems unnecessary. Most hydraulics cycle more times in an hour than these do in a year and last for years. There should only be 4 hoses on the manifold, worst case I can see is by removing 2 you have the one that needs replaced. Removing one hose doesn't seem like a real labor penalty if another one does have to be replaced later.